Me and my girlfriend were very satisfied with Petz and his place. Following his instructions it is easy to find it, everything was clean, prepared and as described. We arrived before ordinary check-in time, but Petz arranged a cleaning lady, who prepared the room for us before our arrival.
It is in a quiet part of Bangkok, very easily accessible by Bangkok Metropolitan Rapid Transit. There are plenty of cafés, restaurants and 7/11 shop close to his place. It takes less than hour to reach his place from BKK airport using just public transport.
We've spent few days with our host, he works (among others) as a bicycle tour guide, therefore he knows the city very good. He introduced us into Thailand and especially Bangkok, showed us some places only locals know about and was a very good companion in general :) We also recommend trying his city bike tour, don't worry, there are plenty to choose from.
Petz also communicated very quickly before our arrival, even in unusual times, so we made clear everything before we arrived to BKK.